HF is Hydrofluoric acid just as HCl is a gas. It needs to be Aqueous to be useful. right!
I've got a metal vapor project stirring up- I've been making vapor deposited crystals of metals up to silver for some time now!!
Wrong. When the gas is breathed in it turns into an acid in your lungs. One breath of HF or 4 of Cl and you die a terribly painful death.